Oven at 375f.,Cook noodles as per package directions. Drain and set aside.,In a small saucpan, melt butter and sautee onions and celery, until onions are tender. Add cream of mushroom soup and milk.,______,In a casserole dish, combine noodles, chicken and cream of mushroom soup mix. Stir until blended. Top with 3/4 cup of cheese.,Bake for 30-35 minutes.